Get N number of values from object with jq - json

Question

I'm trying to retrieve a given number of values from the following json object (just used 2 for brevity):
[
{
"content": null,
"deleted": false,
"metadata": null,
"name": "name/windows-2016-osDisk.170b8936-d66d-4139-a409-26f4e9d354fe.vhd",
"properties": {
"appendBlobCommittedBlockCount": null,
"blobTier": "P10",
"blobTierChangeTime": null,
"blobTierInferred": true,
"blobType": "PageBlob",
"contentLength": 136367309312,
"contentRange": null,
"contentSettings": {
"cacheControl": null,
"contentDisposition": null,
"contentEncoding": null,
"contentLanguage": null,
"contentMd5": "-0q970378r08==",
"contentType": "application/octet-stream"
},
"copy": {
"completionTime": null,
"id": null,
"progress": null,
"source": null,
"status": null,
"statusDescription": null
},
"creationTime": "2019-11-21T08:34:33+00:00",
"deletedTime": null,
"etag": "0237502375",
"lastModified": "2019-11-21T08:34:33+00:00",
"lease": {
"duration": null,
"state": "available",
"status": "unlocked"
},
"pageBlobSequenceNumber": null,
"remainingRetentionDays": null,
"sequenceNumber": 1,
"serverEncrypted": true
},
"snapshot": null
},
{
"content": null,
"deleted": false,
"metadata": null,
"name": "name/windows-2019-osDisk.f122fb3c-0edb-42a8-b98c-56657b447f15.vhd",
"properties": {
"appendBlobCommittedBlockCount": null,
"blobTier": "P10",
"blobTierChangeTime": null,
"blobTierInferred": true,
"blobType": "PageBlob",
"contentLength": 136367309312,
"contentRange": null,
"contentSettings": {
"cacheControl": null,
"contentDisposition": null,
"contentEncoding": null,
"contentLanguage": null,
"contentMd5": "0237502375/hKOg==",
"contentType": "application/octet-stream"
},
"copy": {
"completionTime": null,
"id": null,
"progress": null,
"source": null,
"status": null,
"statusDescription": null
},
"creationTime": "2019-11-21T08:35:03+00:00",
"deletedTime": null,
"etag": "20397520i3h523",
"lastModified": "2019-11-21T08:35:03+00:00",
"lease": {
"duration": null,
"state": "available",
"status": "unlocked"
},
"pageBlobSequenceNumber": null,
"remainingRetentionDays": null,
"sequenceNumber": 1,
"serverEncrypted": true
},
"snapshot": null
}
]
I sort this on creationTime in jq like so: jq 'sort_by(.properties.creationTime)' When I pipe this through | .[].name making jq 'sort_by(.properties.creationTime) | .[].name I get a sorted list of the names.
My question is: How can I pass an integer to this command and remove these many names, starting from the most recent created (bottom)?

Answer 1

following
https://stedolan.github.io/jq/manual/v1.6/#Builtinoperatorsandfunctions
slicing should work:
jq 'sort_by(.properties.creationTime) | .[-1:]'

Answer 2

The answer I've used is the following:
jq 'sort_by(.properties.creationTime) | .[-4:] | .[].name'
Where -4 is the amount of names to display starting from the bottom.